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Installation of sensors or sensing heads
Relay configuration: Energized on alarm
Contact
Alarm indicator status and fault indica-
tion by the alarm indicator
Alarm trig-
gered
Normally
OFF
Closed
Normally
ON
Open
Connecting the relay connector
The wires for alarm devices must be connected to the 9-pin
relay connector. A piece of wire insulation (heat-shrink tube)
and a protective cover are included for extra protection of the
relay wires.
1. Remove the 9-pin connector.
2. Cut the heat-shrink tube as needed and slide it over the
relay wires before insertion into the 9-pin connector.
3. Position the heat-shrink tube at the edge of the wire
insulation and use a heat gun to shrink the tubing securely
onto the wire insulation.
4. Slide the protective cover over the wires.
5. Connect the wires for alarm 1 (pre-alarm), alarm 2 (main
alarm), and error alert to the relevant terminals as
indicated in the wiring table (see "Connecting the relay
connector", page 12).
6. Plug the connector back into the socket and tighten the
screws.
7. Close the instrument, see 4.1.2.7 Closing the gas
detector.
4.1.2.6 Grounding the instrument
1. Ground the instrument locally at the grounding lug, see
figures G and H on the fold-out page..
2. Connect the shielding of the wires only to the device
ground of the controller (e.g. ground, earthing bar).
3. Check the protective earth conductor. To do so, measure
the passage between the housing and the ground
connection.
Unless special measures have been taken (e.g.
capacitive grounding), the shielding need only be
connected at one end.
4.1.2.7 Closing the gas detector
1. Make sure that the following connections have been
established correctly:
a. The screws of the wired connections are tightened with
the correct torque.
b. All cable connections are secured with screws.
c. The sensor connector is plugged in.
d. Polytron 5100 EC only:
The eye of the earthing cable that comes out of the
plug of the cable extension is connected in the housing
(see Figure H on the fold-out page).
12
Transmitter-
Field wiring
specific
fault
fault
not indicated indicated
not indicated not indicated
2. Insert the printed circuit board unit in the lower part of the
housing.
3. Screw the housing cover onto the lower part of the
housing and tighten with the correct torque.
4. Tighten the threaded pin.
4.2
Increased safety (Ex e) installation -
with Docking Station
The installation with enhanced safety (Ex e) is described in
the assembly instructions for the docking station (part number
9033242).
5
Installation of sensors or sensing
heads
5.1
Installing the EC sensor on the
Polytron 5100 EC
See figure C on the fold-out page.
1. Unscrew the threaded pin (2) (2 mm hexagon socket
screw).
2. Unscrew and remove the bayonet ring (3) and remove the
dummy disk.
3. Insert the sensor (4) in the opening and turn until it
engages in the gas detector. This does not damage the
sensor connector.
4. Secure the sensor with the corresponding bayonet ring
(3).
5. Tighten the threaded pin (2) so that the bayonet ring
cannot come loose (required for installations in zone 22).
5.2
Installing the sensing head
Depending on the type of explosion protection, there will be
various sensing heads used. Information relating to the
installation of the sensing heads can be found in the
respective sensing head manual.
For remote applications, the cable shielding must be attached
on both the sensor and transmitter side. The cable length
should be ≤ 30 m.
Remote versions with "Explosion-proof (Ex d)" explosion
protection
Transmitter
Polytron 5100 EC
Polytron 5200 CAT
(for DQ sensors)
Polytron 57x0 IR
Instructions for use
Sensing head IFU part
numbers
Remote EC sensing head
(9033247)
DQ NPT aluminum remote
sensor, DQ NPT steel remote
sensor (9033888, 4544286)
Remote PIR 7000 (334) with
stainless steel or aluminum
sensor connection housing
(4544286)
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Dräger Polytron 5000 Series
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